All Free PDF Tools

Every DimlyPDF tool runs in your browser — no account, no server uploads. Pick a tool below for dark mode conversion, compression, merging, splitting, image export, page numbering, and rotation. All processing is local and private.

The toolkit

• PDF Dark Mode Converter — convert any PDF to a true dark background with four themes; text, links, and bookmarks stay selectable.
• Compress PDF — shrink file size by removing duplicate objects and cleaning structure, with no quality loss.
• Merge PDFs — combine multiple documents into one and drag to reorder before merging.
• Split PDF — extract pages or ranges (for example 1-3, 5, 8-12) into separate files, downloaded as a ZIP.
• PDF to JPG / PNG — render every page to a high-resolution image and download all pages as a ZIP.
• Add Page Numbers — stamp page numbers in any of six positions with a custom start number and format.
• Rotate PDF — rotate all pages 90, 180, or 270 degrees to fix orientation, with no rasterization.

Because every tool processes files entirely on your device, DimlyPDF is safe for confidential contracts, medical records, financial statements, and any document you would not want uploaded to a third-party server.